Thermal detector



FIG. 1 is a perspective view of a thermal detector showing our new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a side elevational view taken from the right of FIG. 1;

FIG. 5 is a bottom plan view thereof;

FIG. 6 is a perspective view of a second embodiment;

FIG. 7 is a top plan view thereof;

FIG. 8 is a front elevational view thereof;

FIG. 9 is a side elevational view taken from the right of FIG. 6;

FIG. 10 is a rear elevational view thereof;

FIG. 11 is a bottom plan view thereof;

FIG. 12 is a perspective view of a third embodiment;

FIG. 13 is a top plan view thereof;

FIG. 14 is a front elevational view thereof;

FIG. 15 is a side elevational view taken from the right of FIG. 12;

FIG. 16 is a rear elevational view thereof. 

The ornamental design for a thermal detector, as shown and described. 